Controller cannot release after observing a notification.

[starlight173]

Hello, I got an issue that the view controller cannot release when observing a notification like this.

let observable = NotificationCenter.default.observable(for: Notification.Name.UIApplicationDidEnterBackground)
observe(observable) { notification in
    print("Application did enter background")
}

How to fix it ? Thanks.

[MaximeLM]

Hello, you should use [weak self] in your event handlers to avoid creating a retain cycle, like this:

let observable = NotificationCenter.default.observable(for: Notification.Name.UIApplicationDidEnterBackground)
observe(observable) { [weak self] notification in
    print("Application did enter background")
    self?.doSomething()
}